HI 



PHILOSOPHICAL 



TRANSACTIONS 



OF THE 



ROYAL SOCIETY OF LONDON 



SERIES A. 



CONTAINING 1'APEES OF A MATHEMATICAL OE PHYSICAL CHAEACTEE. 



VOL. 205. 



LONDON : 



PRINTED BY HARRISON AND SONS, ST. MARTIN'S LANE, W.C., 



iit ^rbinarg to |jis gjajtstg. 



MAY, 1906. 



